Publications by authors named "Takamitsu Ohnishi"

The present study compared trends in antimicrobial resistance patterns in pathogens isolated from skin and soft-tissue infections (SSTIs) in Japan with those of a nationwide survey conducted in 2013. Three organisms that caused most of the SSTIs were collected from 12 dermatology departments in medical centers and 12 dermatology clinics across Japan between April 2019 and August 2020. A total of 390 strains, including 267 Staphylococcus aureus, 109 coagulase-negative staphylococci (CNS), and 14 Streptococcus pyogenes strains were submitted to a central laboratory for antimicrobial susceptibility testing.

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The impact of the COVID-19 pandemic on biologic treatment for psoriasis in Japan remains to be elucidated. This study aimed to investigate changes in biologic treatment and patients' behavior of visiting our department, especially in psoriasis patients treated with biologics before and during the pandemic. Data were collected from medical records retrospectively.

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Herpes zoster (HZ) is caused by reactivation of latent varicella zoster virus (VZV) in the cranial nerve or dorsal root ganglia, with spread of the virus along the sensory nerve to the dermatome. Postherpetic neuralgia is a feared complication of HZ and impairs patients' quality of life enormously. However, there is no predictor of the duration of neuralgia.

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The combination of BRAF inhibitor and MEK inhibitor is one of the first-line treatments for unresectable BRAF-mutant melanoma or as an adjuvant therapy. However, some patients who received the combination of dabrafenib and trametinib (CombiDT) or the combination of encorafenib and binimetinib (CombiEB) had adverse events (AEs) including pyrexia. We herein report a patient with BRAF-mutated melanoma who repeatedly developed elevated levels of D-dimer and pyrexia after CombiDT and CombiEB treatments.

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Article Synopsis
  • TARC is a chemokine related to T-helper 2 cells and is found in higher levels in individuals with atopic dermatitis; however, its role in psoriasis and related conditions was less understood prior to this study.* -
  • In a study of 75 patients, serum TARC levels were notably higher in those with generalized pustular psoriasis (GPP) compared to other types of psoriasis (psoriasis vulgaris and psoriatic arthritis), and showed a positive correlation with disease severity.* -
  • The findings suggest that serum TARC could serve as a potential biomarker for psoriasis severity and treatment response in GPP, warranting further research to confirm its significance.*
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Dupilumab shows high efficacy and tolerable safety for the treatment of atopic dermatitis (AD). However, the extent of its effectiveness varies in individual patients. To date, practical predictors of later effectiveness of dupilumab in AD patients have not been reported.

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Article Synopsis
  • Research on the connection between psoriasis and thyroid dysfunction shows mixed results, prompting an investigation into this relationship among different types of psoriasis.
  • In a study of 85 psoriasis patients, 14% were found to have thyroid dysfunction, with the highest prevalence in those with generalized pustular psoriasis (GPP).
  • Patients with thyroid dysfunction had worse psoriasis severity and higher levels of inflammation (as indicated by C-reactive protein) compared to those without thyroid issues, suggesting a link between thyroid problems and psoriasis-related inflammation.
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Psoriasis is a T-helper (Th)1/Th17-mediated, chronic inflammatory dermatitis that is commonly treated with topical corticosteroids and vitamin D analogs. The combination of a topical corticosteroid and vitamin D analog showed superior efficacy to each alone in clinical trials; however, the mechanisms by which the topical corticosteroid and vitamin D analog exert their effects on lesional skin in combination and each alone remain unknown. In this study, we examined the effects of combined calcipotriol (Cal)/betamethasone dipropionate (BD) ointment on psoriasis in vivo, utilizing imiquimod (IMQ)-induced murine psoriasiform skin inflammation, compared with each alone.

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Skin and soft tissue infections (SSTI) are a common infection among both outpatients and inpatients. The most frequently isolated bacterium in SSTI was Staphylococcus aureus, a quarter of which was methicillin-resistant S. aureus (MRSA).

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Article Synopsis
  • Psoriasis is a long-lasting skin disease treated effectively with anti-TNFα, IL-17A, and IL-23p19 antibodies, but the role of regulatory T cells (Tregs) in this treatment is not fully understood.!* -
  • In a study using mice, treatment with these antibodies showed improved skin conditions and increased levels of beneficial Tregs, particularly after administering anti-IL-17A and IL-23p19.!* -
  • The findings suggest that inhibiting the IL-17/IL-23 pathway not only reduces inflammation but also boosts the number and effectiveness of Tregs, helping combat psoriasis symptoms more effectively.!*
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Generalized pustular psoriasis (GPP) is a systemic inflammatory disease that presents with erythema and sterile pustules, pathologically characterized by Kogoj's spongiform pustules. GPP is sometimes accompanied by mucosal involvement, and the most common lesion is on the tongue. IL36RN mutation was found to contribute to the pathogenesis of GPP especially in patients who develop GPP without a past medical history of psoriasis vulgaris.

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Rhododendrol (RD), 4-(4-hydroxyphenyl)-2-butanol, inhibits melanin synthesis and had been used in skin-whitening cosmetic products until 2013. However, some individuals developed leukoderma on the skin where RD had been applied and have suffered from refractory depigmentation even after discontinuing RD application. Bimatoprost is a prostaglandin F2α analog and is often used for eyelash growth for cosmetic reasons as well as in the treatment of glaucoma.

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